GB1568019A - Radio and television receivers including muting circuits - Google Patents

Radio and television receivers including muting circuits Download PDF

Info

Publication number
GB1568019A
GB1568019A GB10065/78A GB1006578A GB1568019A GB 1568019 A GB1568019 A GB 1568019A GB 10065/78 A GB10065/78 A GB 10065/78A GB 1006578 A GB1006578 A GB 1006578A GB 1568019 A GB1568019 A GB 1568019A
Authority
GB
United Kingdom
Prior art keywords
signal
detector
synchronous
circuit
video
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB10065/78A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of GB1568019A publication Critical patent/GB1568019A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)
GB10065/78A 1977-03-16 1978-03-14 Radio and television receivers including muting circuits Expired GB1568019A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52028979A JPS6041493B2 (ja) 1977-03-16 1977-03-16 受信機

Publications (1)

Publication Number Publication Date
GB1568019A true GB1568019A (en) 1980-05-21

Family

ID=12263525

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10065/78A Expired GB1568019A (en) 1977-03-16 1978-03-14 Radio and television receivers including muting circuits

Country Status (8)

Country Link
US (1) US4238771A (nl)
JP (1) JPS6041493B2 (nl)
AU (1) AU513375B2 (nl)
CA (1) CA1106491A (nl)
DE (1) DE2811542A1 (nl)
FR (1) FR2384390A1 (nl)
GB (1) GB1568019A (nl)
NL (1) NL189587C (nl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55136774A (en) * 1979-04-13 1980-10-24 Hitachi Ltd Audio buzz erase unit for television receiver
DE3127278C1 (de) * 1981-07-10 1982-12-16 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen NF-Verstaerker fuer ein Fernsehgeraet
US4641190A (en) * 1985-05-10 1987-02-03 Rca Corporation Muting system
DE4011650A1 (de) * 1990-04-11 1991-10-17 Licentia Gmbh Regelschaltung fuer einen ueberlagerungsempfaenger

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904678A (en) * 1958-12-10 1959-09-15 Rca Corp Semi-conductor squelch circuit
DE1282746B (de) * 1966-10-27 1968-11-14 Telefunken Patent Empfaenger fuer frequenz-, phasen- oder amplitudenmodulierte Schwingungen mit einer Krachsperre
US3714583A (en) * 1970-08-26 1973-01-30 Rca Corp Muting circuit
US3686430A (en) * 1971-03-25 1972-08-22 Louis W Parker Muter for solid state television receivers
JPS4979762A (nl) * 1972-12-09 1974-08-01
JPS5722252B2 (nl) * 1973-09-28 1982-05-12
US3871022A (en) * 1973-12-03 1975-03-11 Motorola Inc Noise and overload protection circuit for synchronous demodulators
US3862361A (en) * 1973-12-28 1975-01-21 Rca Corp Video amplifier circuit for use with synchronous detectors
US3873925A (en) * 1974-03-07 1975-03-25 Motorola Inc Audio frequency squelch system
US3979679A (en) * 1975-06-30 1976-09-07 California Microwave, Inc. FM demodulator having squelch circuit using bucket brigade delay line
JPS5914931B2 (ja) * 1976-02-16 1984-04-06 ソニー株式会社 自動位相制御回路
JPS52119108A (en) * 1976-03-31 1977-10-06 Sansui Electric Co Muutuning device
NL7613946A (nl) * 1976-12-16 1978-06-20 Philips Nv Televisieontvanger met een demodulatorschakeling voor het demoduleren van een op een draaggolf ge- moduleerd televisiesignaal.

Also Published As

Publication number Publication date
FR2384390A1 (fr) 1978-10-13
DE2811542C2 (nl) 1989-11-09
AU3420278A (en) 1979-09-20
FR2384390B1 (nl) 1985-04-26
CA1106491A (en) 1981-08-04
US4238771A (en) 1980-12-09
AU513375B2 (en) 1980-11-27
DE2811542A1 (de) 1978-09-21
NL189587C (nl) 1993-05-17
NL7802887A (nl) 1978-09-19
JPS6041493B2 (ja) 1985-09-17
JPS53114309A (en) 1978-10-05

Similar Documents

Publication Publication Date Title
EP0512374B1 (en) Audio level equalization of television sound, broadcast FM and national weather service FM radio signals
EP0428173A2 (en) Radio frequency signal amplifying circuit in radio receiver
KR100211412B1 (ko) Fm 라디오를 포함하는 텔레비젼 수상기
US4674121A (en) Circuit for detecting the level of noise in FM signal for use in AM/FM receiver
US5361406A (en) Audio level equalization of broadcast and national weather service FM radio signals
US4370520A (en) AM Stereo receiver
NL8204865A (nl) Geluidsdetectieschakeling voor op het "intercarrier"-principe gebaseerde geluidsdetectie bij een televisieontvanger.
GB1568019A (en) Radio and television receivers including muting circuits
US4362999A (en) AM Stereo phase modulation decoder
US4419695A (en) Television sound receiver
US4396949A (en) Television sound receiver
US3842198A (en) Sound demodulator and afc system
JPH06105967B2 (ja) ビデオ信号処理装置における自動利得制御装置
GB2102229A (en) Television sound receivers
US4249038A (en) Stereo decoder with 19KHz-pilot suppression and improved oscillator phase locking
US4181890A (en) Apparatus for receiving signals in plural frequency bands
GB2090499A (en) Sync separator
US3483316A (en) Hue control circuitry for color television receivers
US2913579A (en) Frequency variation response circuit
US2901536A (en) Intercarrier sound buzz reducing circuit
US3414820A (en) Delayed agc system utilizing the plateau region of an amplifier transistor
US3306976A (en) Receiver system comprising a transistorized agc circuit
GB1590359A (en) Synchronous detector circuits
US5303410A (en) Signal strength meter circuit for radio receiver
JPS60212038A (ja) 受信機

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950314